High-Level items (item category LUMF, Sales BOM Usage 5) in PO's

Question

One of our plants supplies High-Level Items to their customers. The GenItemCatGroup MARA-MTPOS_MARA and the Item category group MVKE-MTPOS for these items is =  LUMF.  These are essentially Phantom items, which they do not stock.
Weu2019ve created BOMu2019s for these items with BOM Usage 5
The components for these BOMu2019s are GenItemCatGroup MARA-MTPOS_MARA and the Item category group MVKE-MTPOS = NORM
In our sales orders, the high-level (LUMF) item comes in with Item Category TAQ, and all sub-items come into the order as TAE.
The TAQ items are relevant for pricing.  The TAE items are not.
The requirements in MD04 are as follows:  No requirement for the LUMF item (phantom item).  Requirements DO appear for the sib-items.
Everything seems to be working fine as far as Sales Orders are concerned.
Our problem is that this same plant will also sell the same LUMF high-level items to other plants within our organization via Purchase Order (Type NB).
When an NB purchase order is processed, the MD04 only shows requirement for the LUMF Phantom Material.  There are no requirements generated for the sub-items.
What do we need to do so that the NB Purchase Orders with LUMF items react the same way that sales orders do, as far as demand in stock requirements, pricing, etc?

Answer 1

Ashish,
Suppose the material is completed then the value is shown against final product. In that case we use Item vategory Group ERLA. The maina item category will be shown as TAQ. The Subitem will take item category TAE (text item)
If the material is still not complete then the value is ascertaind through sub items in that case LUMF item category is used and item category for the main item is TAP and for sub items it is TAN.
In any case we will change the item category group as (ERLA or LUMF) in the material master of the final material "Computer". Where as the subitems item category will be "Norm".
Note: If you use standarad Order = OR, and standard item category group ERLA in the Finished MAterial Conmputer, then system will automatically assign item categories for Main item = TAQ and SUb Items = TAE.
Standard process and ORder = OR
Then  Execute MM02 for finished material or Main materialo alone i.e., "Computer",  Assign Item Category Group = ERLA and save. Then create BOM CS01, CS11 Single level the output will be
COMPUTER = TAQ
SCREEn = TAE
HERdisk = TAE
Key board= TAE.
Similarly if you proceed process by changing Item category group = LUMF for main material i.e., Finished goods "Computer" then
COMPUTER = TAP
SCREEn = TAN
HERdisk = TAN
Key board= TAN
If you are changing the document type prefixed with Z , then you need to proceed with "Assign tem Catgeory"
Regards
Sathya